Jami` at-Tirmidhi 3288
جامع الترمذي#3288Sahihحَدَّثَنَا مَحْمُودُ بْنُ غَيْلاَنَ، حَدَّثَنَا أَبُو دَاوُدَ، عَنْ شُعْبَةَ، عَنِ الأَعْمَشِ، عَنْ مُجَاهِدٍ، عَنِ ابْنِ عُمَرَ، قَالَ انْفَلَقَ الْقَمَرُ عَلَى عَهْدِ رَسُولِ اللَّهِ صلى الله عليه وسلم فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " اشْهَدُوا " . قَالَ هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ .
Narrated Ibn 'Umar:"The moon was split during the time of the Messenger of Allah (ﷺ). So the Messenger of Allah (ﷺ) said: 'Bear witness
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Ahmad Muhammad ShakirSahih
Al-AlbaniSahih
Bashar Awad MaaroufHasan Sahih
Zubair Ali ZaiSahih Muslim
In-book reference: 47:67